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LT1781CSW Datasheet

  • LT1781CSW

  • Low Power 5V RS232 Dual Driver/Receiver with 【15kV ESD Prot...

  • 12頁(yè)

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LT1780/LT1781
Low Power 5V RS232
Dual Driver/Receiver with
鹵15kV
ESD Protection
DESCRIPTIO
The LT
廬
1780/LT1781 are dual RS232 driver/receiver pairs
with integral charge pump to generate RS232 voltage
levels from a single 5V supply. Using only 0.1碌F external
capacitors, these circuits consume only 40mW of power,
and can operate to 120kbaud even while driving heavy
capacitive loads. New ESD structures on the chip allow the
LT1780/LT1781 to survive
鹵15kV
air gap and
鹵8kV
con-
tact ESD tests per IEC 1000-4-2, eliminating the need for
costly TransZorbs
廬
on the RS232 line pins. The LT1780/
LT1781 are fully compliant with EIA RS232 standards.
Driver outputs are protected from overload, and can be
shorted to ground or up to
鹵30V
without damage. During
SHUTDOWN or power-off conditions, driver and receiver
outputs are in a high impedance state, allowing line
sharing.
The LT1780/LT1781 are direct upgrades to the LT1180A/
LT1181A, LT1280A/LT1281A and LT1381 for applications
which require the utmost ESD protection.
The LT1781 is available in 16-pin DIP,SO and SW pack-
ages. The LT1780 is supplied in 18-pin DIP and SW
packages for applications which require SHUTDOWN.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TransZorb is a registered trademark of General Instruments, GSI.
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
10mA Max Supply Current
ESD Protection to IEC 1000-4-2 Level 4
鹵
15kV Air Gap,
鹵
8kV Contact
Uses Small Capacitors: 0.1
碌
F
120kBaud Operation for R
L
= 3k, C
L
= 2500pF
250kBaud Operation for R
L
= 3k, C
L
= 1000pF
Outputs Withstand
鹵30V
Without Damage
CMOS Comparable Low Power: 40mW
Operates from a Single 5V Supply
Rugged Bipolar Design
Outputs Assume a High Impedance State When Off
or Powered Down
Meets All RS232 Specifications
Available With or Without Shutdown
Absolutely No Latch-up
APPLICATI
s
s
s
s
s
S
Portable Computers
Battery-Powered Systems
Power Supply Generator
Terminals
Modems
TYPICAL APPLICATI
2
0.1碌F
4
LT1780
5
0.1碌F
6
12
LOGIC
INPUTS
7
3
17
5V INPUT
V
+
OUT
0.1碌F
V
鈥?/div>
OUT
0.1碌F
DRIVER
OUTPUT
R
L
= 3k
C
L
= 2500pF
15
RS232 OUTPUT
11
13
8
14
5k
RECEIVER
OUTPUT
R
C
L
= 50pF
RS232 OUTPUT
RS232 INPUT
INPUT
LOGIC
OUTPUTS
10
18
9
5k
16
RS232 INPUT
ON/OFF
1780/81 鈥?TA01
U
UO
UO
Output Waveforms
1780/81 鈥?TA02
1

LT1781CSW 產(chǎn)品屬性

  • LT1780/81LT1780/81 Spec Notice

  • 47

  • 集成電路 (IC)

  • 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器

  • -

  • 收發(fā)器

  • 2/2

  • RS232

  • 4.5 V ~ 5.5 V

  • 表面貼裝

  • 16-SOIC（0.295"，7.50mm 寬）

  • 16-SOIC

  • 管件

LT1781CSW相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
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    廠商
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    UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
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    4.5ns, 3V/5V/?V, Rail-to-Rail Comparator
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  • 英文版
    Single/Dual 4.5ns, 3V/5V, Rail-to-Rail Comparators
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  • 英文版
    UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
    ETC
  • 英文版
    Dual, 4.5ns, 3V/5V/?V, Rail-to-Rail Comparator
    Linear
  • 英文版
    4ns, 150MHz Dual Comparator with Independent Input/Output Su...
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  • 英文版
    UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
    ETC
  • 英文版
    7ns, Low Power, 3V/5V/?V Rail-to-Rail Comparator
    Linear
  • 英文版
    UNDERSTANDING THE SUBJECT IS CUSTOMER SERVICE
    ETC
  • 英文版
    4ns, 150MHz Dual Comparator with Independent Input/Output Su...
    LINER
  • 英文版
    7ns, Low Power, 3V/5V Dual Rail-to-Rail Comparator
    Linear
  • 英文版
    7ns, Low Power, 3V/5V Dual Rail-to-Rail Comparator
    Linear
  • 英文版
    4ns, 150MHz Dual Comparator with Independent Input/Output Su...
    LINER
  • 英文版
    4ns, 150MHz Dual Comparator with Independent Input/Output Su...
    Linear
  • 英文版
    SOT-23, 44V, Over-The-Top, Micropower, Precision Rail-to-Rai...
    LINER
  • 英文版
    SOT-23, 44V, Over-the-Top, Micropower, Precision, Rail-to-Ra...
    Linear

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